package gulimall.coupon.config;

import com.baomidou.mybatisplus.annotation.DbType;
import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.transaction.annotation.EnableTransactionManagement;

/**
 * @author HLF
 * @version V1.0
 * @package boot.config
 * @date 2021/11/21 16:01
 *
 * 配置分页拦截器
 */

@Configuration
@EnableTransactionManagement
public class MyBatisConfig {

    @Bean
    public MybatisPlusInterceptor mybatisPlusInterceptor() {
        PaginationInnerInterceptor paginationInnerInterceptor = new PaginationInnerInterceptor(DbType.MYSQL);
        // 设置请求的页面大于最大页后操作， true调回到首页，false 继续请求  默认false
        // paginationInterceptor.setOverflow(false);
        // 设置最大单页限制数量，默认 500 条，-1 不受限制
        // paginationInterceptor.setLimit(500);
        // 开启 count 的 join 优化,只针对部分 left join
        paginationInnerInterceptor.setOverflow(true);//超出最大限制页数，跳回首页
        paginationInnerInterceptor.setMaxLimit(500L);//设置每页最大显示数据条数


        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
        interceptor.addInnerInterceptor(paginationInnerInterceptor);
        return interceptor;
    }
}
